   (.sample rdd with-replacement? fraction seed))
 
 ;; ## Actions
+;;
 ;; Action return their results to the driver process.
+;;
 (defn count-by-key
   "Only available on RDDs of type (K, V).
   Returns a map of (K, Int) pairs with the count of each key."

  (sparkop [x] (u/truthy? (f x))))

;; ## RDD construction
(defn text-file [spark-context filename]
  (.textFile spark-context filename))


  ([spark-context lst num-slices] (.parallelize spark-context lst num-slices)))

;; ## Transformations
;;
;; Function for transforming RDDs
;;
(defn map
  [rdd f]
  (.map rdd (function f)))
